Question

7. 20 g of CaCO3 on decomposition gives
g of CaO.
a) 10 g
b) 10.12g
c) 11.2g
d) 20g​

Answer 1

Answer:

Chemical reaction involved is:

CaCO

3

→CaO+CO

2

Molar mass of CaCO

3

=40+12+16×3=100 g

According to the balanced reaction 100 g of CaCO

3

produces 1 mol of CO

2

i.e. 22.4 L at STP.

∴50 g CaCO

3

will produce

100

22.4

×50=11.2 L CO

2

at STP

Explanation:

option c is is a correct answer

Answer 2

this is exactly correct answer....

done by me....